humimeter BLL - wood chip moisture meter with a 1 m probe

Wood chip moisture measured straight in the pile

The humimeter BLL has a one metre insertion probe that is pushed into a pile, a container or a trailer. The result comes in seconds, with no sample taken and no weighing - the simplest way of checking a wood chip delivery on the spot, before it goes into the boiler house.

What you can measure

The measuring range of 10 to 50 % water content corresponds to wood moisture of up to 100 % referred to dry matter.

Your benefits

  • one metre insertion probe, extendable to two metres
  • measurement straight in the pile, with no sample taken
  • replaceable measuring tip - a worn tip is changed without replacing the probe
  • automatic temperature compensation and measurement of the material temperature
  • data logger for 10 000 readings with a measuring point report
  • steel cross handle that makes pushing the probe in easier
  • result in seconds
   humimeter BLL wood chip moisture meter with its 1 m insertion probe

How a measurement is taken

  1. Push the probe into the pile over its full length, holding the instrument by the cross handle.
  2. Read the water content and the temperature of the material.
  3. Repeat the measurement at several points in the pile - wood chip moisture can differ between the surface and the middle.
  4. Store the readings with the name of the measuring point if the result is going into the intake documentation.
   Measuring the moisture of a wood chip pile with the humimeter BLL probe

Water content and wood moisture

Both figures describe the same water but refer it to something different: water content (WC) is the mass of water divided by the total mass, while wood moisture (WM) divides it by the dry mass. That is why 50 % water content equals 100 % wood moisture. The BLL reports water content, which is what biomass settlement calls for; the reference method is described in EN ISO 18134.

Technical data

Parameter Value
Article number 12029
Measuring range 10 to 50 % water content, corresponding to 100 % wood moisture
Resolution 0.5 % water content
Calibration accuracy against the reference material ±2.5 %
Temperature compensation automatic
Temperature range when determining water content 0 to +40 °C
Temperature measuring range -10 to +80 °C
Memory hold function, manual data logger for 10 000 readings with measuring point reports
Probe insertion probe, 1 m long, with a replaceable tip
Dimensions 1155 × 75 × 45 mm without the cross handle
Weight 830 g with batteries
Power supply 4 alkaline AA batteries, 1.5 V
Menu languages English, German, Italian, French, Spanish, Portuguese, Czech, Russian, Polish, international

Scope of delivery

The USB interface module with LogMemorizer software is not included - it is a separate item, art. no. 12278.

Checking the readings

The test block art. no. 12308 gives a quick check that the instrument still measures as it did on the day of calibration. In the 2026 price list it is listed for the FL1, FL2, FLH, BLL, BL2, WLW, BLW, SLW, RM1 and BLO. Independently of that it is worth comparing the reading periodically with the oven method.

   Test block art. no. 12308 for checking the readings of the humimeter BLL

Extended accessories

BLL or another wood chip meter

The BLL measures with a single push of the probe and is the simplest answer wherever a delivery has to be checked quickly. The humimeter BL2 takes the same probe but also a ram electrode, so it covers solid wood and logs as well. The humimeter BMA-2 measures from a 12 litre sample, reaches 70 % water content and gives a result accurate to ±1.0 %, but it is a stationary instrument. For continuous measurement on a conveyor there is the HGT-A transmitter.

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